发明名称 |
Method and system for isolated dot detection and growth in a document image |
摘要 |
A method for detecting and growing isolated dots in a document image having a plurality of pixels is provided. The method includes isolating the pixels of the image to form a plurality of windows, each window having a target pixel; detecting an isolated dot in the received image; identifying a dot growth factor to grow the detected isolated dot in the received image; using the dot growth factor to identify tiered pixel patterns from a plurality of predefined, tiered pixel patterns, wherein each of the tiered pixel patterns having a predetermined dot growth factor; comparing the pixels within each window to the pixel patterns within the identified tier to identify a match between the pixels within the window and at least one of the pixel patterns; and changing a pixel value of the target pixel, when a match is identified, to grow the isolated dot by the dot growth factor. |
申请公布号 |
US8804200(B2) |
申请公布日期 |
2014.08.12 |
申请号 |
US201213547738 |
申请日期 |
2012.07.12 |
申请人 |
Xerox Corporation |
发明人 |
Li Xing;Wen Zhenhuan;Malik Amal |
分类号 |
H04N1/40;G06T5/00;H04N1/46 |
主分类号 |
H04N1/40 |
代理机构 |
Pillsbury Winthrop Shaw Pittman, LLP |
代理人 |
Pillsbury Winthrop Shaw Pittman, LLP |
主权项 |
1. A computer-implemented method for detecting and growing isolated dots in a document image having a plurality of pixels, wherein the method is implemented in a computer system comprising one or more processors configured to execute one or more computer program modules, the method comprising:
receiving a document image having a plurality of pixels therein; isolating the pixels of the received image to form a plurality of windows, each window comprising a target pixel and a plurality of pixels surrounding the target pixel; detecting an isolated dot in the received image; identifying a dot growth factor to grow the isolated dot in the received image; using the dot growth factor to identify tiered pixel patterns from a plurality of predefined, tiered pixel patterns, wherein each of the tiered pixel patterns having a predetermined dot growth factor; comparing the pixels within each window to the pixel patterns within the identified tier to identify a match between the pixels within the window and at least one of the pixel patterns; and changing a pixel value of the target pixel, when a match is identified, to grow the detected isolated dot in the image by the dot growth factor. |
地址 |
Norwalk CT US |